/**
 ******************************************************************************
 * @file    stm32f1xx_hal_dma.c
 * @author  MCD Application Team
 * @brief   DMA HAL module driver.
 *         This file provides firmware functions to manage the following
 *         functionalities of the Direct Memory Access (DMA) peripheral:
 *           + Initialization and de-initialization functions
 *           + IO operation functions
 *           + Peripheral State and errors functions
 @verbatim
 ==============================================================================
 ##### How to use this driver #####
 ==============================================================================
 [..]
 (#) Enable and configure the peripheral to be connected to the DMA Channel
 (except for internal SRAM / FLASH memories: no initialization is 
 necessary). Please refer to the Reference manual for connection between peripherals
 and DMA requests.

 (#) For a given Channel, program the required configuration through the following parameters:
 Channel request, Transfer Direction, Source and Destination data formats,
 Circular or Normal mode, Channel Priority level, Source and Destination Increment mode
 using HAL_DMA_Init() function.

 (#) Use HAL_DMA_GetState() function to return the DMA state and HAL_DMA_GetError() in case of error 
 detection.
 
 (#) Use HAL_DMA_Abort() function to abort the current transfer
 
 -@-   In Memory-to-Memory transfer mode, Circular mode is not allowed.
 *** Polling mode IO operation ***
 =================================
 [..]
 (+) Use HAL_DMA_Start() to start DMA transfer after the configuration of Source
 address and destination address and the Length of data to be transferred
 (+) Use HAL_DMA_PollForTransfer() to poll for the end of current transfer, in this
 case a fixed Timeout can be configured by User depending from his application.

 *** Interrupt mode IO operation ***
 ===================================
 [..]
 (+) Configure the DMA interrupt priority using HAL_NVIC_SetPriority()
 (+) Enable the DMA IRQ handler using HAL_NVIC_EnableIRQ()
 (+) Use HAL_DMA_Start_IT() to start DMA transfer after the configuration of
 Source address and destination address and the Length of data to be transferred.
 In this case the DMA interrupt is configured
 (+) Use HAL_DMA_IRQHandler() called under DMA_IRQHandler() Interrupt subroutine
 (+) At the end of data transfer HAL_DMA_IRQHandler() function is executed and user can
 add his own function by customization of function pointer XferCpltCallback and
 XferErrorCallback (i.e. a member of DMA handle structure).

 *** DMA HAL driver macros list ***
 ============================================= 
 [..]
 Below the list of most used macros in DMA HAL driver.

 (+) __HAL_DMA_ENABLE: Enable the specified DMA Channel.
 (+) __HAL_DMA_DISABLE: Disable the specified DMA Channel.
 (+) __HAL_DMA_GET_FLAG: Get the DMA Channel pending flags.
 (+) __HAL_DMA_CLEAR_FLAG: Clear the DMA Channel pending flags.
 (+) __HAL_DMA_ENABLE_IT: Enable the specified DMA Channel interrupts.
 (+) __HAL_DMA_DISABLE_IT: Disable the specified DMA Channel interrupts.
 (+) __HAL_DMA_GET_IT_SOURCE: Check whether the specified DMA Channel interrupt has occurred or not. 

 [..] 
 (@) You can refer to the DMA HAL driver header file for more useful macros  

 @endverbatim
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2016 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file in
 * the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */

/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_hal.h"

/** @addtogroup STM32F1xx_HAL_Driver
 * @{
 */

/** @defgroup DMA DMA
 * @brief DMA HAL module driver
 * @{
 */

#ifdef HAL_DMA_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup DMA_Private_Functions DMA Private Functions
 * @{
 */
static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
		uint32_t DstAddress, uint32_t DataLength);
/**
 * @}
 */

/* Exported functions ---------------------------------------------------------*/

/** @defgroup DMA_Exported_Functions DMA Exported Functions
 * @{
 */

/** @defgroup DMA_Exported_Functions_Group1 Initialization and de-initialization functions
 *  @brief   Initialization and de-initialization functions 
 *
 @verbatim
 ===============================================================================
 ##### Initialization and de-initialization functions  #####
 ===============================================================================
 [..]
 This section provides functions allowing to initialize the DMA Channel source
 and destination addresses, incrementation and data sizes, transfer direction, 
 circular/normal mode selection, memory-to-memory mode selection and Channel priority value.
 [..]
 The HAL_DMA_Init() function follows the DMA configuration procedures as described in
 reference manual.  

 @endverbatim
 * @{
 */

/**
 * @brief  Initialize the DMA according to the specified
 *         parameters in the DMA_InitTypeDef and initialize the associated handle.
 * @param  hdma: Pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma) {
	uint32_t tmp = 0U;

	/* Check the DMA handle allocation */
	if (hdma == NULL) {
		return HAL_ERROR;
	}

	/* Check the parameters */
	assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));
	assert_param(IS_DMA_DIRECTION(hdma->Init.Direction));
	assert_param(IS_DMA_PERIPHERAL_INC_STATE(hdma->Init.PeriphInc));
	assert_param(IS_DMA_MEMORY_INC_STATE(hdma->Init.MemInc));
	assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(hdma->Init.PeriphDataAlignment));
	assert_param(IS_DMA_MEMORY_DATA_SIZE(hdma->Init.MemDataAlignment));
	assert_param(IS_DMA_MODE(hdma->Init.Mode));
	assert_param(IS_DMA_PRIORITY(hdma->Init.Priority));

#if defined (DMA2)
  /* calculation of the channel index */
  if ((uint32_t)(hdma->Instance) < (uint32_t)(DMA2_Channel1))
  {
    /* DMA1 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA1_Channel1) / ((uint32_t)DMA1_Channel2 - (uint32_t)DMA1_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA1;
  }
  else 
  {
    /* DMA2 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA2_Channel1) / ((uint32_t)DMA2_Channel2 - (uint32_t)DMA2_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA2;
  }
#else
	/* DMA1 */
	hdma->ChannelIndex = (((uint32_t) hdma->Instance - (uint32_t) DMA1_Channel1)
			/ ((uint32_t) DMA1_Channel2 - (uint32_t) DMA1_Channel1)) << 2;
	hdma->DmaBaseAddress = DMA1;
#endif /* DMA2 */

	/* Change DMA peripheral state */
	hdma->State = HAL_DMA_STATE_BUSY;

	/* Get the CR register value */
	tmp = hdma->Instance->CCR;

	/* Clear PL, MSIZE, PSIZE, MINC, PINC, CIRC and DIR bits */
	tmp &= ((uint32_t) ~(DMA_CCR_PL | DMA_CCR_MSIZE | DMA_CCR_PSIZE |
	DMA_CCR_MINC | DMA_CCR_PINC | DMA_CCR_CIRC |
	DMA_CCR_DIR));

	/* Prepare the DMA Channel configuration */
	tmp |= hdma->Init.Direction | hdma->Init.PeriphInc | hdma->Init.MemInc
			| hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment
			| hdma->Init.Mode | hdma->Init.Priority;

	/* Write to DMA Channel CR register */
	hdma->Instance->CCR = tmp;

	/* Initialise the error code */
	hdma->ErrorCode = HAL_DMA_ERROR_NONE;

	/* Initialize the DMA state*/
	hdma->State = HAL_DMA_STATE_READY;
	/* Allocate lock resource and initialize it */
	hdma->Lock = HAL_UNLOCKED;

	return HAL_OK;
}

/**
 * @brief  DeInitialize the DMA peripheral.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_DeInit(DMA_HandleTypeDef *hdma) {
	/* Check the DMA handle allocation */
	if (hdma == NULL) {
		return HAL_ERROR;
	}

	/* Check the parameters */
	assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

	/* Disable the selected DMA Channelx */
	__HAL_DMA_DISABLE(hdma);

	/* Reset DMA Channel control register */
	hdma->Instance->CCR = 0U;

	/* Reset DMA Channel Number of Data to Transfer register */
	hdma->Instance->CNDTR = 0U;

	/* Reset DMA Channel peripheral address register */
	hdma->Instance->CPAR = 0U;

	/* Reset DMA Channel memory address register */
	hdma->Instance->CMAR = 0U;

#if defined (DMA2)
  /* calculation of the channel index */
  if ((uint32_t)(hdma->Instance) < (uint32_t)(DMA2_Channel1))
  {
    /* DMA1 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA1_Channel1) / ((uint32_t)DMA1_Channel2 - (uint32_t)DMA1_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA1;
  }
  else
  {
    /* DMA2 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA2_Channel1) / ((uint32_t)DMA2_Channel2 - (uint32_t)DMA2_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA2;
  }
#else
	/* DMA1 */
	hdma->ChannelIndex = (((uint32_t) hdma->Instance - (uint32_t) DMA1_Channel1)
			/ ((uint32_t) DMA1_Channel2 - (uint32_t) DMA1_Channel1)) << 2;
	hdma->DmaBaseAddress = DMA1;
#endif /* DMA2 */

	/* Clear all flags */
	hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << (hdma->ChannelIndex));

	/* Clean all callbacks */
	hdma->XferCpltCallback = NULL;
	hdma->XferHalfCpltCallback = NULL;
	hdma->XferErrorCallback = NULL;
	hdma->XferAbortCallback = NULL;

	/* Reset the error code */
	hdma->ErrorCode = HAL_DMA_ERROR_NONE;

	/* Reset the DMA state */
	hdma->State = HAL_DMA_STATE_RESET;

	/* Release Lock */
	__HAL_UNLOCK(hdma);

	return HAL_OK;
}

/**
 * @}
 */

/** @defgroup DMA_Exported_Functions_Group2 Input and Output operation functions
 *  @brief   Input and Output operation functions
 *
 @verbatim
 ===============================================================================
 #####  IO operation functions  #####
 ===============================================================================
 [..]  This section provides functions allowing to:
 (+) Configure the source, destination address and data length and Start DMA transfer
 (+) Configure the source, destination address and data length and
 Start DMA transfer with interrupt
 (+) Abort DMA transfer
 (+) Poll for transfer complete
 (+) Handle DMA interrupt request

 @endverbatim
 * @{
 */

/**
 * @brief  Start the DMA Transfer.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @param  SrcAddress: The source memory Buffer address
 * @param  DstAddress: The destination memory Buffer address
 * @param  DataLength: The length of data to be transferred from source to destination
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Start(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
		uint32_t DstAddress, uint32_t DataLength) {
	HAL_StatusTypeDef status = HAL_OK;

	/* Check the parameters */
	assert_param(IS_DMA_BUFFER_SIZE(DataLength));

	/* Process locked */
	__HAL_LOCK(hdma);

	if (HAL_DMA_STATE_READY == hdma->State) {
		/* Change DMA peripheral state */
		hdma->State = HAL_DMA_STATE_BUSY;
		hdma->ErrorCode = HAL_DMA_ERROR_NONE;

		/* Disable the peripheral */
		__HAL_DMA_DISABLE(hdma);

		/* Configure the source, destination address and the data length & clear flags*/
		DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);

		/* Enable the Peripheral */
		__HAL_DMA_ENABLE(hdma);
	} else {
		/* Process Unlocked */
		__HAL_UNLOCK(hdma);
		status = HAL_BUSY;
	}
	return status;
}

/**
 * @brief  Start the DMA Transfer with interrupt enabled.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @param  SrcAddress: The source memory Buffer address
 * @param  DstAddress: The destination memory Buffer address
 * @param  DataLength: The length of data to be transferred from source to destination
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Start_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
		uint32_t DstAddress, uint32_t DataLength) {
	HAL_StatusTypeDef status = HAL_OK;

	/* Check the parameters */
	assert_param(IS_DMA_BUFFER_SIZE(DataLength));

	/* Process locked */
	__HAL_LOCK(hdma);

	if (HAL_DMA_STATE_READY == hdma->State) {
		/* Change DMA peripheral state */
		hdma->State = HAL_DMA_STATE_BUSY;
		hdma->ErrorCode = HAL_DMA_ERROR_NONE;

		/* Disable the peripheral */
		__HAL_DMA_DISABLE(hdma);

		/* Configure the source, destination address and the data length & clear flags*/
		DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);

		/* Enable the transfer complete interrupt */
		/* Enable the transfer Error interrupt */
		if (NULL != hdma->XferHalfCpltCallback) {
			/* Enable the Half transfer complete interrupt as well */
			__HAL_DMA_ENABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));
		} else {
			__HAL_DMA_DISABLE_IT(hdma, DMA_IT_HT);
			__HAL_DMA_ENABLE_IT(hdma, (DMA_IT_TC | DMA_IT_TE));
		}
		/* Enable the Peripheral */
		__HAL_DMA_ENABLE(hdma);
	} else {
		/* Process Unlocked */
		__HAL_UNLOCK(hdma);

		/* Remain BUSY */
		status = HAL_BUSY;
	}
	return status;
}

/**
 * @brief  Abort the DMA Transfer.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Abort(DMA_HandleTypeDef *hdma) {
	HAL_StatusTypeDef status = HAL_OK;

	if (hdma->State != HAL_DMA_STATE_BUSY) {
		/* no transfer ongoing */
		hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;

		/* Process Unlocked */
		__HAL_UNLOCK(hdma);

		return HAL_ERROR;
	} else

	{
		/* Disable DMA IT */
		__HAL_DMA_DISABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));

		/* Disable the channel */
		__HAL_DMA_DISABLE(hdma);

		/* Clear all flags */
		hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);
	}
	/* Change the DMA state */
	hdma->State = HAL_DMA_STATE_READY;

	/* Process Unlocked */
	__HAL_UNLOCK(hdma);

	return status;
}

/**
 * @brief  Aborts the DMA Transfer in Interrupt mode.
 * @param  hdma  : pointer to a DMA_HandleTypeDef structure that contains
 *                 the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Abort_IT(DMA_HandleTypeDef *hdma) {
	HAL_StatusTypeDef status = HAL_OK;

	if (HAL_DMA_STATE_BUSY != hdma->State) {
		/* no transfer ongoing */
		hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;

		status = HAL_ERROR;
	} else {
		/* Disable DMA IT */
		__HAL_DMA_DISABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));

		/* Disable the channel */
		__HAL_DMA_DISABLE(hdma);

		/* Clear all flags */
		__HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_GI_FLAG_INDEX(hdma));

		/* Change the DMA state */
		hdma->State = HAL_DMA_STATE_READY;

		/* Process Unlocked */
		__HAL_UNLOCK(hdma);

		/* Call User Abort callback */
		if (hdma->XferAbortCallback != NULL) {
			hdma->XferAbortCallback(hdma);
		}
	}
	return status;
}

/**
 * @brief  Polling for transfer complete.
 * @param  hdma:    pointer to a DMA_HandleTypeDef structure that contains
 *                  the configuration information for the specified DMA Channel.
 * @param  CompleteLevel: Specifies the DMA level complete.
 * @param  Timeout:       Timeout duration.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_PollForTransfer(DMA_HandleTypeDef *hdma,
		uint32_t CompleteLevel, uint32_t Timeout) {
	uint32_t temp;
	uint32_t tickstart = 0U;

	if (HAL_DMA_STATE_BUSY != hdma->State) {
		/* no transfer ongoing */
		hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;
		__HAL_UNLOCK(hdma);
		return HAL_ERROR;
	}

	/* Polling mode not supported in circular mode */
	if (RESET != (hdma->Instance->CCR & DMA_CCR_CIRC)) {
		hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
		return HAL_ERROR;
	}

	/* Get the level transfer complete flag */
	if (CompleteLevel == HAL_DMA_FULL_TRANSFER) {
		/* Transfer Complete flag */
		temp = __HAL_DMA_GET_TC_FLAG_INDEX(hdma);
	} else {
		/* Half Transfer Complete flag */
		temp = __HAL_DMA_GET_HT_FLAG_INDEX(hdma);
	}

	/* Get tick */
	tickstart = HAL_GetTick();

	while (__HAL_DMA_GET_FLAG(hdma, temp) == RESET) {
		if ((__HAL_DMA_GET_FLAG(hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma))
				!= RESET)) {
			/* When a DMA transfer error occurs */
			/* A hardware clear of its EN bits is performed */
			/* Clear all flags */
			hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);

			/* Update error code */
			SET_BIT(hdma->ErrorCode, HAL_DMA_ERROR_TE);

			/* Change the DMA state */
			hdma->State = HAL_DMA_STATE_READY;

			/* Process Unlocked */
			__HAL_UNLOCK(hdma);

			return HAL_ERROR;
		}
		/* Check for the Timeout */
		if (Timeout != HAL_MAX_DELAY) {
			if ((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout)) {
				/* Update error code */
				SET_BIT(hdma->ErrorCode, HAL_DMA_ERROR_TIMEOUT);

				/* Change the DMA state */
				hdma->State = HAL_DMA_STATE_READY;

				/* Process Unlocked */
				__HAL_UNLOCK(hdma);

				return HAL_ERROR;
			}
		}
	}

	if (CompleteLevel == HAL_DMA_FULL_TRANSFER) {
		/* Clear the transfer complete flag */
		__HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));

		/* The selected Channelx EN bit is cleared (DMA is disabled and
		 all transfers are complete) */
		hdma->State = HAL_DMA_STATE_READY;
	} else {
		/* Clear the half transfer complete flag */
		__HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
	}

	/* Process unlocked */
	__HAL_UNLOCK(hdma);

	return HAL_OK;
}

/**
 * @brief  Handles DMA interrupt request.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.  
 * @retval None
 */
void HAL_DMA_IRQHandler(DMA_HandleTypeDef *hdma) {
	uint32_t flag_it = hdma->DmaBaseAddress->ISR;
	uint32_t source_it = hdma->Instance->CCR;

	/* Half Transfer Complete Interrupt management ******************************/
	if (((flag_it & (DMA_FLAG_HT1 << hdma->ChannelIndex)) != RESET)
			&& ((source_it & DMA_IT_HT) != RESET)) {
		/* Disable the half transfer interrupt if the DMA mode is not CIRCULAR */
		if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U) {
			/* Disable the half transfer interrupt */
			__HAL_DMA_DISABLE_IT(hdma, DMA_IT_HT);
		}
		/* Clear the half transfer complete flag */
		__HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));

		/* DMA peripheral state is not updated in Half Transfer */
		/* but in Transfer Complete case */

		if (hdma->XferHalfCpltCallback != NULL) {
			/* Half transfer callback */
			hdma->XferHalfCpltCallback(hdma);
		}
	}

	/* Transfer Complete Interrupt management ***********************************/
	else if (((flag_it & (DMA_FLAG_TC1 << hdma->ChannelIndex)) != RESET)
			&& ((source_it & DMA_IT_TC) != RESET)) {
		if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U) {
			/* Disable the transfer complete and error interrupt */
			__HAL_DMA_DISABLE_IT(hdma, DMA_IT_TE | DMA_IT_TC);

			/* Change the DMA state */
			hdma->State = HAL_DMA_STATE_READY;
		}
		/* Clear the transfer complete flag */
		__HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));

		/* Process Unlocked */
		__HAL_UNLOCK(hdma);

		if (hdma->XferCpltCallback != NULL) {
			/* Transfer complete callback */
			hdma->XferCpltCallback(hdma);
		}
	}

	/* Transfer Error Interrupt management **************************************/
	else if ((RESET != (flag_it & (DMA_FLAG_TE1 << hdma->ChannelIndex)))
			&& (RESET != (source_it & DMA_IT_TE))) {
		/* When a DMA transfer error occurs */
		/* A hardware clear of its EN bits is performed */
		/* Disable ALL DMA IT */
		__HAL_DMA_DISABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));

		/* Clear all flags */
		hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);

		/* Update error code */
		hdma->ErrorCode = HAL_DMA_ERROR_TE;

		/* Change the DMA state */
		hdma->State = HAL_DMA_STATE_READY;

		/* Process Unlocked */
		__HAL_UNLOCK(hdma);

		if (hdma->XferErrorCallback != NULL) {
			/* Transfer error callback */
			hdma->XferErrorCallback(hdma);
		}
	}
	return;
}

/**
 * @brief Register callbacks
 * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
 *              the configuration information for the specified DMA Channel.
 * @param CallbackID: User Callback identifier
 *                    a HAL_DMA_CallbackIDTypeDef ENUM as parameter.
 * @param pCallback: pointer to private callback function which has pointer to 
 *                   a DMA_HandleTypeDef structure as parameter.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_RegisterCallback(DMA_HandleTypeDef *hdma,
		HAL_DMA_CallbackIDTypeDef CallbackID,
		void (*pCallback)(DMA_HandleTypeDef *_hdma)) {
	HAL_StatusTypeDef status = HAL_OK;

	/* Process locked */
	__HAL_LOCK(hdma);

	if (HAL_DMA_STATE_READY == hdma->State) {
		switch (CallbackID) {
		case HAL_DMA_XFER_CPLT_CB_ID:
			hdma->XferCpltCallback = pCallback;
			break;

		case HAL_DMA_XFER_HALFCPLT_CB_ID:
			hdma->XferHalfCpltCallback = pCallback;
			break;

		case HAL_DMA_XFER_ERROR_CB_ID:
			hdma->XferErrorCallback = pCallback;
			break;

		case HAL_DMA_XFER_ABORT_CB_ID:
			hdma->XferAbortCallback = pCallback;
			break;

		default:
			status = HAL_ERROR;
			break;
		}
	} else {
		status = HAL_ERROR;
	}

	/* Release Lock */
	__HAL_UNLOCK(hdma);

	return status;
}

/**
 * @brief UnRegister callbacks
 * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
 *              the configuration information for the specified DMA Channel.
 * @param CallbackID: User Callback identifier
 *                    a HAL_DMA_CallbackIDTypeDef ENUM as parameter.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_UnRegisterCallback(DMA_HandleTypeDef *hdma,
		HAL_DMA_CallbackIDTypeDef CallbackID) {
	HAL_StatusTypeDef status = HAL_OK;

	/* Process locked */
	__HAL_LOCK(hdma);

	if (HAL_DMA_STATE_READY == hdma->State) {
		switch (CallbackID) {
		case HAL_DMA_XFER_CPLT_CB_ID:
			hdma->XferCpltCallback = NULL;
			break;

		case HAL_DMA_XFER_HALFCPLT_CB_ID:
			hdma->XferHalfCpltCallback = NULL;
			break;

		case HAL_DMA_XFER_ERROR_CB_ID:
			hdma->XferErrorCallback = NULL;
			break;

		case HAL_DMA_XFER_ABORT_CB_ID:
			hdma->XferAbortCallback = NULL;
			break;

		case HAL_DMA_XFER_ALL_CB_ID:
			hdma->XferCpltCallback = NULL;
			hdma->XferHalfCpltCallback = NULL;
			hdma->XferErrorCallback = NULL;
			hdma->XferAbortCallback = NULL;
			break;

		default:
			status = HAL_ERROR;
			break;
		}
	} else {
		status = HAL_ERROR;
	}

	/* Release Lock */
	__HAL_UNLOCK(hdma);

	return status;
}

/**
 * @}
 */

/** @defgroup DMA_Exported_Functions_Group3 Peripheral State and Errors functions
 *  @brief    Peripheral State and Errors functions
 *
 @verbatim
 ===============================================================================
 ##### Peripheral State and Errors functions #####
 ===============================================================================  
 [..]
 This subsection provides functions allowing to
 (+) Check the DMA state
 (+) Get error code

 @endverbatim
 * @{
 */

/**
 * @brief  Return the DMA handle state.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL state
 */
HAL_DMA_StateTypeDef HAL_DMA_GetState(DMA_HandleTypeDef *hdma) {
	/* Return DMA handle state */
	return hdma->State;
}

/**
 * @brief  Return the DMA error code.
 * @param  hdma : pointer to a DMA_HandleTypeDef structure that contains
 *              the configuration information for the specified DMA Channel.
 * @retval DMA Error Code
 */
uint32_t HAL_DMA_GetError(DMA_HandleTypeDef *hdma) {
	return hdma->ErrorCode;
}

/**
 * @}
 */

/**
 * @}
 */

/** @addtogroup DMA_Private_Functions
 * @{
 */

/**
 * @brief  Sets the DMA Transfer parameter.
 * @param  hdma:       pointer to a DMA_HandleTypeDef structure that contains
 *                     the configuration information for the specified DMA Channel.
 * @param  SrcAddress: The source memory Buffer address
 * @param  DstAddress: The destination memory Buffer address
 * @param  DataLength: The length of data to be transferred from source to destination
 * @retval HAL status
 */
static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
		uint32_t DstAddress, uint32_t DataLength) {
	/* Clear all flags */
	hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);

	/* Configure DMA Channel data length */
	hdma->Instance->CNDTR = DataLength;

	/* Memory to Peripheral */
	if ((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH) {
		/* Configure DMA Channel destination address */
		hdma->Instance->CPAR = DstAddress;

		/* Configure DMA Channel source address */
		hdma->Instance->CMAR = SrcAddress;
	}
	/* Peripheral to Memory */
	else {
		/* Configure DMA Channel source address */
		hdma->Instance->CPAR = SrcAddress;

		/* Configure DMA Channel destination address */
		hdma->Instance->CMAR = DstAddress;
	}
}

/**
 * @}
 */

#endif /* HAL_DMA_MODULE_ENABLED */
/**
 * @}
 */

/**
 * @}
 */

